Chip-breaker.



PATENTEDINOV. 28, 1905.

Np. 866,078.- n J. E. GAMER.

0311 BRBAKER.

APPLIOTION FILED MARA, 1905.

2 SHEETS-SHEET 1.

witness Quante/Li l' 1215331121:;31') Nov. 28,1905'.

- l.'r. E. GARNER.

CHIP BREAKBR. APPLICATION FILED MARA', 1906.

2 SHEETS--BHEET Z.

UNITED srnrns PATENT onnion.

` JOHN E. GARNER, OF PHILADELPHiA, PENNSYLVANIA.

CHIP-BREAKER.

Specification, of. Letters Patent.

Patented Nov. 2s, 1905. y l

Appleman and March 1,1905. saranno. 247,993.

.T a/ZZ .whom 2i/many concern;

, Be it known that'I, JOHN E. GARNER, a citi-` zen of the United States, residingat Philadelphia, in the county of Philadelphia and State,

of Pennsylvania, have invented new and usesurface of the Work, however uneven such sur- A face may be, and whereby wide and deeply-cut work can `be operated upon and held from springing up from the -bed of the cuttingmachine.

The preferred embodiment of the invention J, V'/is illustrated Ain the accompanying drawings, Il: 2O

. Figure 1is a perspective view of my imi -proved chip-breaker.

-v section of the same, taken on a line between Fig. 3 is a detail; Fig. 4 is an inverted perspec-` Fig. 2 is a front to rear adjacent bearing-springs. cross-sectlon. tive view of a bearing-spring and attachment lfor securingan extended adjustment of the spring'.v Fig. 5 is a viewsimilar to Fig. 2, showing the linger illustrated in Fig. 4 applied for use. Fig. 6 is adetailsectional view on the line 6 6, Fig. 5, looking in the direction of the artrow; andFig. 7 is adetail perspective view of the yspecial form of linger illustrated inFigs. 4

and 5.

\The numeral 1 in the drawings vdesignates a substantially oblong rectangular block or.

l plate constituting the body or supporting bracket of the breaker. This body is provided upon its upper and lower sides with grooves 2 and 3, extending from-front to rear thereof in a direction transverse to its length. rlhe lower grooves 3 extend entirely from front to rear of the body, while the upper grooves 2 terminate some distance in rear of the front of the body and are connected with the grooves 3 by intervening vertical slots 4. In advance o f the grooves 2 and above the forward ends of the grooves 3 the front portion of the body is made solid, thus providing a transverse reinforcing-bar 5.

The body 1 supports a series of bearingsprings, each spring comprising a horizontal shank 7 terminating at its forward end in an angular finger 8, which linger-projects downward from the front of the body at an oblique end bent upwardly at an obtuse angle thereto to provide a terminal pressure portion 9,

the work. The Shanks 7 ofthe severaLspri..z

Temployed,'are/slidably mounted inthe guidegrooves 3, so that they vmay be adjusted to regulate the relative positions of the bearing portions 9 to conform to the surface of the work, and each shank is clamped in adjusted position vby means of a clamping-platelO, disposed upon the under side thereof, and a bearing against the plate and projecting upwardly therethrough and through an opening in the shank and the slot 4 into the groove 3, where it is provided with a clamping-nut 12, which bridges across-the slot and draws upon the clamping-plate to hold the shank pressed rmly against the under side of the body 1.

body andk project downwardly and forwardly therefrom, so that'their bearing portions 9 in practice will engage vthe upper surface of the work, and by the use of a series of springfingers arranged in this manner it will be readily understood that the ngers are yfree to have movement ina vertical plane to accommodate themselves to irregularities in the surface yof the work, so lthat a lirm bearing will be maintained on all portions of the work in a transverse direction, thus preventing the work from springing up from the body of the .cutting-machine. By slidably mountingv the maybe adjusted so thattheir bearing portions will bearranged to project into and bear upon As, however, the fingers so constructed and' mounted can only be employed for shallow cavities or cuts, I provide means whereby a secure bearing may be maintained on the work when wide and deep cavities or cuts are made. To this end I employ a supportingblock 13, havinga reduced upper guide portion 14, which maybe slidably fitted in any one of the grooved guideways 3. This block is formed in its under side with a segmental or partially-circular recess l5, adapted to refof a special form of spring-linger 17. clamping-block l18 is adapted to engage the outer or concaved surface of the shank 16 to clamp the same a, ;ainstl the curved lwall of the recess 15. The block 18 is secured in posiangle to the body and shank and has its lower tion by a bolt 19, having its head bearing Which is adapted to bear upon the surface of I 'A fingers, of which;anydesirediiumber may be clamping-bolt 11, which latter has its head l The ngersS extend across the front of the' y 9 l shank 6 inthe grooves 3 the spring-lingers the surfaces of cavitiesl of varying depths.

IOO

1o 5 v ceive the curved or arcuate-shaped shank 16 IIO against the under side of said block and its shank projecting through an opening in the shank 16 of the plate and projecting upwardly through the block 13 and provided with a nut '20. The threaded end of the shank of the bolt 19 is adapted to project upwardly through one of the slots 4, similar to the bolts 11, and its nut 2O to bridge said slot to clamp the parts in adjusted position. By this construc- IO tion the finger 17 may be adjusted in a circular path, so that its bearing portion will project downwardly below the bearing portions \'-/ef-the.oth@ [ingers and engage the wall of a deep cut or mortise formed in the work to exl ert pressure upon that portion of the work,

and thus prevent the same lfrom springing upwardly from the bed of the machine. This special form of spring-linger may be employed in conjunction with any number of the other 2O fingers, as will be readily understood.

If desired, I may provide each spring-linger with shoulders 21 at the point of intersection of its shank and downwardly-projecting portion 8, which shoulders will bear 25 against the under side of the reinforcing-bar 5 when the linger bends upward to the limit of its movement, so as to prevent the linger from being broken. It will be observed that the bar 5 overhangs and reinforces the fingers at the point where the greatest strain falls thereon.

From the foregoing description, taken in connection with the accompanying drawings, the construction and mode of operation will be apparent without a further extended description of the invention.

Changes in the form, proportions, and minor details of construction may be made within the scope of the invention without departing from Athe spirit or sacrificing any of the advantages thereof.

Having thus described the invention, what is claimed as new is- 1. A chip-breaker comprising-a body having upper and'lower sets of grooves and intersecting slots, spring-fingers having shanks l sops slidably mounted in the lower grooves, and fastening devices passing through said slots and adj ustably connecting the shanks with the body, said fastening devices having guide members occupying the upper grooves.

2. A chip-breaker comprising a bodj,` having upper and lower sets of grooves and intersecting slots, spring-fingers having Shanks slidably mounted in the lower grooves, bolts engaging said shanlis and projecting upward through the slots into the upper grooves, and nuts upon the upper ends of the bolts.

3. In a chip-breaker, a body, a spring bearing-finger having a curved shank adjustable in a path corresponding to its curvature, and means for mounting said linger upon the body.

4. In a chip-breaker, a body, a support adjustably mounted upon the body` a spring bearing-finger slidably adjustable in a circular path upon said support, and means for securing the linger in adjusted position upon the support and the latter to the body.

5. In a chip-breaker, a body, a supportingblock having a segmental recess, a spring bearing-linger having a segmental shank seated in said recess, a block to clamp the shank in the recess, and means for securing said block and support to the body.

6. A chip-breaker comprising a body having upper and lower sets of grooves and intersecting slots and a reinforcing portion disposed above the forward terminals of the upper slots, spring-lingers having Shanks slidably mounted in the lower grooves and bearing at their forward ends against said reinforcing portion, and fastening-bolts engaging said Shanks and projecting upward through the slots into the upper grooves and provided with clamping and guide members occupying said upper grooves.

In testimony whereof I aflix my signature in presence of 'two witnesses.

JOHN E. GARNER. Witnesses:

DAVID I. GLovER, JOHN MCKEE. 

